Script graphs box plots of DBI scores for all metro areas, grouping by year and
metropolitan area population size (larger or smaller than 250,000 people).
Additional scripts create different graphs.
Data are provided in both "long" and "tall" formats.
Notes: Source: USA data from Russell Lopez, .
Canadian values constructed using Lopez's method from Canadian census tract
profiles for years 1971, 1981, 1991, 2001, and 2011.
See:
Lopez, Russell. 2014. "Urban Sprawl in the United States: 1970–2010."
Cities and the Environment 7 (1): Article 7.
Lopez, Russell, and H. Patricia Hynes. 2003. "Sprawl in the 1990s: Measurement,
Distribution, and Trends." Urban Affairs Review 38 (3):325–55.